On Saturday 04 October 2003 15:10, Jim Wilson wrote:
> I'm going to cross post this over to plib-devel.
> 
> These shots are of a problem that we've been discussing on the Flight 
Gear
> list. It is illustrative of a problem that has been dogging modelers 
when
> building more detailed aircraft models.
> 
> http://www.spiderbark.com/fgfs/ac3dobj.png 
> http://www.spiderbark.com/fgfs/ppeobj.png
> http://www.spiderbark.com/fgfs/ppeobj150.png
> http://www.spiderbark.com/fgfs/ac3dobjwire.png
> http://www.spiderbark.com/fgfs/testobj.ac
> 
> This test object contains 16 vertices.  Note that it is small approx 
0.03
> units "diameter".
> 
> The first screen shot is the test case shown in ac3d.
> 
> The second screen shot is the same test case shot in ppe.
> 
> The third screen shot is a ppe shot of the same model after it was 
scaled up
> in ac3d by 50% (x 1.5).
> 
> The fourth shot is the same model in wireframe showing the structure and 
vertices.
> 
> This problem has been narrowed down to ssgStripify, and I'm hoping 
someone
> might recognize what is going on.  Maybe it is a fault in the follow 
logic. 
> This has been quite a problem with doing detailed models.  There are two 
ways
> that seem to make the problem go away:  1. Scaling up as my test case
> illustrates,  2. Disrupting the texture mapping in some way. For example
> making every other poly alternate between frontwise and planwise 
mapping.
> 
> Best,
> 
> Jim Wilson

That's a pretty clear bit of diag evidence and shows the problem well.

LeeE


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